U.S. patent number 7,396,146 [Application Number 11/463,456] was granted by the patent office on 2008-07-08 for heat dissipating led signal lamp source structure.
This patent grant is currently assigned to Augux Co., Ltd.. Invention is credited to Pei-Choa Wang.
United States Patent |
7,396,146 |
Wang |
July 8, 2008 |
Heat dissipating LED signal lamp source structure
Abstract
A heat dissipating LED signal lamp emitting structure includes
an isothermal board, a light emitting unit on the isothermal board,
a heat conducting cylinder connected to the bottom of the
isothermal board, a heat dissipating body around the periphery of
the heat conducting cylinder and comprised of heat sinks, a
circular cover body above the isothermal board for covering the
isothermal board, a reflecting groove at the center of the cover
body for passing through the light emitting unit, and a transparent
lid on the cover body for covering the light emitting unit. With
the heat dissipating effect of the heat dissipating body, the
operating heat produced by the light emitting unit can be
dissipated to the outside. The invention not only uses a single
light emitting unit as a signal lamp emitting source, but also
enhances the light emitting efficiency and the life expectancy of
the light emitting unit.
Inventors: |
Wang; Pei-Choa (Gueishan
Township, Taoyuan County, TW) |
Assignee: |
Augux Co., Ltd. (Taoyuan
County, TW)
|
Family
ID: |
39050544 |
Appl.
No.: |
11/463,456 |
Filed: |
August 9, 2006 |
Prior Publication Data
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|
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Document
Identifier |
Publication Date |
|
US 20080037255 A1 |
Feb 14, 2008 |
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Current U.S.
Class: |
362/294;
362/373 |
Current CPC
Class: |
F21K
9/233 (20160801); F21V 29/505 (20150115); F21V
5/04 (20130101); F21V 29/773 (20150115); F21Y
2115/10 (20160801); F21V 23/002 (20130101) |
Current International
Class: |
F21V
29/00 (20060101) |
Field of
Search: |
;362/96,234,294,373,800
;313/11 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Ward; John A
Claims
What is claimed is:
1. A heat dissipating LED signal lamp emitting structure,
comprising: an isothermal board, made of a highly thermal
conducting material; a light emitting diode, attached on an upper
side of the isothermal board; a heat conducting cylinder, being a
hollow body with an outer diameter not larger than that of the
isothermal board, axially attached on a lower side of the
isothermal board, having an electrode plug disposed on a lower
distal surface thereof and electrically coupled to the light
emitting unit; a heat dissipating body, having a receiving hole for
receiving the heat conducting cylinder; a cover body, coupled to
the upper side of the isothermal board, and having a reflecting
groove for accommodating the light emitting unit; and a lid,
disposed on the cover body, for covering the light emitting unit
inside the lid.
2. The heat dissipating LED signal lamp emitting structure of claim
1, wherein the isothermal board further includes a through
hole.
3. The heat dissipating LED signal lamp emitting structure of claim
1, wherein the heat conducting cylinder has a circular protruding
board disposed on an cylindrical surface thereof against the heat
dissipating body.
4. The heat dissipating LED signal lamp emitting structure of claim
1, wherein the heat dissipating body includes a plurality of heat
sink fins.
5. The heat dissipating LED signal lamp emitting structure of claim
1, wherein the heat dissipating body forms a sunken space at top
thereof, for accommodating the isothermal board to contact each
other.
6. The heat dissipating LE 5 D signal lamp emitting structure of
claim 1, wherein the reflecting groove further has a reflecting
surface disposed at a periphery of the reflecting groove.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a signal lamp, and more
particularly to a signal lamp structure that uses a light emitting
diode as a light source.
2. Description of Prior Art
In general, a signal lamp is installed at an intersection of roads
for directing pedestrians to walk or stop at a specific time, so as
to assure the traffic flow and safety, maintain the order of
traffics, and even lower the chance of traffic jams and
accidents.
A common traffic signal lamp is the three-color traffic signal lamp
that reminds pedestrians when to walk or stop by means of three
colors: red, yellow and green. A traditional three-color signal
lamp uses white bulbs to work with red, yellow and green lens or
color bulbs that can emit red, yellow and green lights, and the
signal lamp is covered and protected by a lampshade, so as to form
a light emitting structure of the signal lamp. However, the
traditional signal lamp structure that emits light by bulbs may be
sheltered by sunlight in daytime easily or affected by rain in a
rainy day, and thus weather conditions may directly affect a
pedestrian's determination of the color of the signal lamp, and the
chance for the occurrence of accidents may be increased.
To overcome the shortcomings of the traditional bulbs, a prior art
uses a light emitting diode (LED) to substitute the traditional
bulb as the light source of the signal lamp. Since the light source
of light emitting diodes has the advantages of consuming less
electric power and providing a high light emitting efficiency and a
long life expectancy. As technology advances rapidly, the LED is
much brighter than ever and thus the light source of light emitting
diodes can be used for substituting the traditional bulb. Such
arrangement not only saves power consumption and long time of use,
but also provides high recognition in different weather conditions
and greatly reduces pedestrians' misjudgment and the chance of
occurrence of accidents.
In the present existing LED signal lamp structures, most light
emitting structures require 125 to 188 pieces of light emitting
diodes. Since the light emitting diodes will produce a considerable
quantity of heat during their operations and general signal lamps
usually do not come with a heat dissipating structure for the light
emitting diodes, therefore a great deal of heat will be accumulated
in the signal lamp structure. As a result, the temperature in the
signal lamp will rise and may cause a short circuit of the light
emitting diodes, and the signal lamp will become dimmer or
inoperable, which will directly affect pedestrians' judgment and
endanger traffic safety. Although a prior art structure uses an
aluminum board for dissipating the heat produced by a plurality of
light emitting diodes, the heat dissipating effect is very limited
and unable to enhance the heat dissipation of the signal lamp,
which becomes a blemish of the LED signal lamp structure.
SUMMARY OF THE INVENTION
In view of the foregoing shortcomings of the prior art, the
inventor of the present invention based on years of experience in
the related industry to conduct experiments and modifications, and
finally designed a heat dissipating LED signal lamp emitting
structure in accordance with the present invention.
Therefore, the present invention is to provide an LED signal lamp
emitting source structure having a heat dissipating structure that
uses a single light emitting unit as the signal lamp emitting
source, and the light emitting unit has a heat dissipating
structure disposed at the periphery of the light emitting unit to
dissipate the heat produced by the light emitting unit to the
outside, Besides substituting a plurality of traditional light
emitting units by a single light emitting unit, the present
invention also provides a design of a heat dissipating structure to
enhance the light emitting efficiency and the life expectancy of
the light emitting unit.
The present invention provides an LED signal lamp emitting source
structure that comprises an isothermal board being a highly thermal
conducting disc, a light emitting unit disposed on the isothermal
board, a hollow heat conducting cylinder connected to the bottom of
the isothermal board, a heat dissipating body disposed around the
periphery of the heat conducting cylinder and comprised of a
plurality of heat sinks, a circular cover body disposed above the
isothermal board for covering the isothermal board, a reflecting
groove disposed at the center of the cover body for passing through
the light emitting unit, and a transparent lid disposed on the
cover body for covering the light emitting unit. With the heat
dissipating effect of the heat dissipating body, the operating heat
produced by the light emitting unit can be dissipated to the
outside. The invention not only uses a single light emitting unit
as a signal lamp emitting source, but also enhances the light
emitting efficiency and the life expectancy of the light emitting
unit.
BRIEF DESCRIPTION OF DRAWINGS
The features of the invention believed to be novel are set forth
with particularity in the appended claims. The invention itself
however may be best understood by reference to the following
detailed description of the invention, which describes certain
exemplary embodiments of the invention, taken in conjunction with
the accompanying drawings in which:
FIG. 1 is an exploded view of the present invention;
FIG. 2 is a perspective view of the present invention;
FIG. 3 is a cross-sectional view of the operation of the present
invention;
FIG. 4 is an exploded view of an assembly of the present
invention;
FIG. 5 is a perspective view of an assembly of the present
invention; and
FIG. 6 is a cross-sectional view of operating an assembly of the
present invention.
DETAILED DESCRIPTION OF THE INVENTION
The technical characteristics, features and advantages of the
present invention will become apparent in the following detailed
description of the preferred embodiments with reference to the
accompanying drawings. However, the drawings are provided for
reference and illustration only and are not intended for limiting
the scope of the invention.
Referring to FIGS. 1 and 2 for a schematic view and a perspective
view of the present invention, a signal lamp structure of the
invention comprises an isothermal board 1, a light emitting element
2, a heat conducting cylinder 3, a heat dissipating body 4, a cover
body 5, and a lid 6, wherein the isothermal board 1 of this
embodiment is substantially in the shape of a circular disc, and
the isothermal board 1 is made of a highly thermal conducting
material. The isothermal board 1 has a through hole 11, and the
light emitting unit 2 is disposed on the isothermal board 1, and
the light emitting unit 1 of this embodiment is a light emitting
diode, and the light emitting element 2 is electrically coupled to
a conducting wire 7 (as shown in FIG. 3) and passed through the
through hole 11 of the isothermal board 1 to connect to a power
supply externally. The bottom of the isothermal board 1 is
connected to a hollow heat conducting cylinder 3 for absorbing the
heat conducted from the isothermal board 1, and the lower end of
the heat conducting cylinder 3 has a circular protruding board 31,
and the lower end of the heat conducting cylinder 31 has a
plurality of electrode plugs 32, and the interior of the heat
conducting cylinder 3 is provided for passing the conducting wire 7
and electrically connecting the electrode plugs 32 (which is a
prior art and thus will not be described here). The heat
dissipating body 4 is comprised of a plurality of heat sinks 41 and
disposed around the periphery of the heat conducting cylinder 3,
and a heat dissipating gap 42 is formed between any two heat sinks
41, and the bottom of a plurality of heat sinks 41 is connected to
the protruding board 31 of the heat conducting cylinder 3. After
the plurality of heat sinks 41 are assembled to form the heat
dissipating body 4, the top of the heat dissipating body 4 forms a
circular sunken space 43 for containing the isothermal board 1 and
attaching the periphery of the isothermal board 1. The cover body 5
is installed above the isothermal board 1, and the cover body 5 is
a hollow disc for covering the isothermal board 1 inside the cover
body 5, and the middle of the cover body 5 has a reflecting groove
51 corresponding to the position of the light emitting unit 2
precisely. In the meantime, the light emitting unit 2 is contained
in the reflecting groove 51, and the periphery of the reflecting
groove 51 has a reflecting surface 511 for reflecting the light
produced by the light emitting unit 2. Finally, the lid 6 is
installed on the cover body 5, while the light emitting unit 2 is
covered in the lid 6. The lid 6 is a transparent cover for letting
the light produced by the light emitting unit 2 pass through the
lid 6 to the outside. FIG. 2 shows an assembly of the
invention.
Referring to FIG. 3 for a cross-sectional view of an application of
the present invention, the light emitting unit 2 disposed on the
isothermal board 1 is electrically connected to the conducting wire
7 for supplying electric power for the operation, after the LED
signal lamp of the invention is assembled. The light produced by
the light emitting unit 2 is passed through the lid 6 to the
outside directly or reflected from the reflecting surface 511 at
the periphery of the light emitting unit 2 out of the lid 6
indirectly, so as to form a light source of the signal lamp
structure, and the operating heat produced by the light emitting
unit 2 is absorbed by the isothermal board 1 to lower the heat
accumulation effect produced by the light emitting unit 2, and then
the isothermal board 1 conducts the absorbed operating heat onto
the heat conducting cylinder 3 and dissipates the heat to the heat
dissipating body 4 connected to the heat conducting cylinder 3, or
the isothermal board 1 directly conducts the operating heat to the
periphery which is attached to the plurality of heat sinks 41 for
the heat dissipation, so as to enhance the light emitting
efficiency and the life expectancy of the light emitting unit
2.
Referring to FIGS. 4 and 5 for an exploded view and a perspective
view of an assembly of the invention, the LED signal lamp emitting
source of the invention is set on the a lamp holder 8, and the lamp
holder 8 is substantially in the shape of a disc, and the center of
the lamp holder 8 has a containing hole 81 for installing the LED
signal lamp emitting source. In the meantime, the lamp holder 8 is
connected to a reflecting board 9, and the center of the reflecting
board 9 also has a penetrating groove 91 corresponding to the
position of the containing hole 81 of the lamp holder 8. Finally,
the lamp holder 8 is connected to a corresponding transparent
lampshade 10 for covering the reflecting board 9 and the LED signal
lamp emitting source inside the lamp holder 8. FIG. 5 shows the
assembly of the present invention.
Referring to FIG. 6 for a cross-sectional view of an operation of
the present invention, the light produced by the LED signal lamp
emitting source forms a light directly through the lampshade 10. In
the meantime, the light produced by the LED signal lamp emitting
source is refracted from the reflecting board 9 to the outside for
enhancing the brightness of the light produced by the signal lamp,
so that pedestrians can clearly recognize the signal lamp. Further,
the operating heat produced by the LED signal lamp emitting source
during the operation of the signal lamp is dissipated from the heat
dissipating body 4 to assure the normal operation and the long life
expectancy of the signal lamp.
The present invention is illustrated with reference to the
preferred embodiment and not intended to limit the patent scope of
the present invention. Various substitutions and modifications have
suggested in the foregoing description, and other will occur to
those of ordinary skill in the art. Therefore, all such
substitutions and modifications are intended to be embraced within
the scope of the invention as defined in the appended claims.
* * * * *